Simple and Virtually Unbreakable, the Everest Collapsible Shoulder Rest features a one-piece body integrated with adjustable leg height. This means that there are no angle brackets or swivel mechanisms to break, and no thumb knobs to misplace. The EF-2 shoulder rest is made of a strong, high grade ABS material which provides both strength and flexibility, unlike the inexpensive polypropylene plastic that cheaper shoulder rest manufacturers use. Fits: